Add "Class" to PCH/I2C based chassis intrusion sensor config

Tested-by: Intrusion status can be read via readfish on WFP (PCH/I2C solution)

Change-Id: Ie3192a8e82753cd0d08214f7fbbbb41a17dde20a
Signed-off-by: Qiang XU <qiang.xu@linux.intel.com>
diff --git a/configurations/WFT Baseboard.json b/configurations/WFT Baseboard.json
index 998e0bb..09521be 100644
--- a/configurations/WFT Baseboard.json
+++ b/configurations/WFT Baseboard.json
@@ -1039,6 +1039,7 @@
         {
             "Address": "0x44",
             "Bus": 3,
+            "Class": "I2C",
             "Name": "Chassis Intrusion Sensor",
             "Type": "ChassisIntrusionSensor"
         },